Process Lasso v3.15 beta 1, now digitally signed

[Jeremy Collake]

I've managed to save up enough to buy a digital signing certificate so that everyone can be sure that Bitsum's software indeed comes from Bitsum .  I've released v3.15 beta 1, digitally signed. I don't anticipate any issues, so will probably push v3.16 final on out tomorrow morning after I've done some regression testing.